Cap for lamp-sockets, pendant-switches, and other electrical devices.



0. J. KLEIN. GAP FOR LAMP SOCKETS, PENDANT SWITCHES, AND OTHER ELECTRICAL DEVICES.

APPLICATION FILED APR.8.1912,

1,121,374, Patented Dec. 15, 1914.

CHARLES J. KLEIN, F. IZIIL'WAUKEE, WISCONSIN, ASSIGNOR TO THE CUTLER-HAMMER MFG. 50., OF IEILWTA'UKEE, WISCON$IN, A CORPORATION OF \VISCOIISIN.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed April 8, 1912. Serial No. 689,289. r.

To (ZZZ 107mm may; concern:

Be it known that 1, CHARLES J, KLEIN, a citizen of the United States, residing at Milwaukee, in the county of lllilwaukee and State of ll' isoonsin, have invented new and useful Improvements in Caps for Lamp- Sockets, Pentlonhswitches, and other Eleotricul Devices, 01 which the following is a full, clear, concise, and exact descript on, reference being hurl to the accompanying clrmving, forming part of this specification.

My invention rel-lites to caps for lump sockets, penclmi switches and other electrical devices.

It has among ts objects provide a, cup with lining retaining means which serve to holrl the lining seeurcl in position and permit the some to he readily inserted or removed.

other objects and advantages of my invention Will heroine 'ter appear.

In or-tlez' to more fully disclose in in vent-ion mil describe the embodiments thereof shown in the aceouipnnyinfg draw- It should he understood howe'ren the forms shown are susceptible of iuoution,

In these drawing": Figure 1 s a vertical rm. of C1 sectional view througl'i one l, the cl p Sl'lOw'H in 1 and 2 having one of the lining; retaining members position thereir l. is o partial sectional view of the ports right angles to l. is a perspective View of the insulating; lining. *3 is a v "L'lCfll sectional View through modified form rat-mp. Y is bottom plan view or the dome member of the esp filth the lining retaining-means positioned thereon. or; line of Fig t Fig. 9 is u perspeo tire of :1 nio ifiecl Ti OII" of the lining retuini mean? t In in l 6. 7 and 8. Fig. is a vertical sectional View to ouph another form of cap. sectional View on line ll 11 of 10.

I shall first rieserihe that form of my ino is a, sectional view vention shown in Figs. 1 to 4. The cap is provided with a. dome shaped portion 1 having two yielding strips 2 located therein on opposite sides of the cap and holding an insulating lining 3 in position Within the some. The strips 2 extend across the interior of the cap in chord like relation with respect thereto and are preferably connected at both ends to the some. These strips are preferably formed of punchings of thin resilient metal of resilient wire. In these figures I have shown a cap of the construction described and claimed in my co-pending application, Serial No. 660,345, filed November th. 1911, wherein the domeshnperl member of the cup is provided with an annular flange 4 over which is spun u depending rim 5 urrangecl to fitover the s oltet shell. In. such a construction, in order to provide a sturdy support, I prefernhly clamp the curls of the resilient lining retaining strips 2 between the flange l and the rim In order to hold the retaining means snugly in position unll to assist in the process of assembling them, I preferably provide the strips 2 with enlarged or bentover ends 6 which snap over the flange iin notched or cut-u my portions 7 the some. 3 and l.) lVhen the domeshuperl member 1 and rim 5 are secured to gether as by the spinning on of rim to the flange 4:, the resilient supports 2 are very securely and snugly held in position in such a mannerns to provide exceedingly sturdy supports for the lining. (Fig. In order that the yi lrlinp; supports 2- may have sufficient play, I preferably provide the lower surface of the flange l with grooves 8 connecting the out-awn portions 7. (See Fig. 3.)

By the provision of the resilient supports r strips the lining may be inserted in the cap by simply forcing: it between the strip: which then rececle into the grooves 8 and after the passage of the lining into the snap out to the position shown in 1. It is to he noted that in this position ouch strip supports the insulating; lining" at two peripheral points and underlies the lin' the lining against, the

between these points, thereby firmly securing the lining in place and obviating all danger of its accidental displacement. To remove the lining it is only necessary to exert a lateral pressure upon one of the strips to how the same out of the path of the lining, after which the lining may be readily withdrawn. The bowing of the strip may be readily accomplished by inserting a thin instrument or the thumb nail between the lining and the cap and then moving the same around the periphery of yielding strip. To facilitate the insertion and removal of the lining the strips may be slightly bowed if desired before inserting them in the cap. Due to the provision of my yielding retaining means the lining used may be entirely plain and of the simplest construction (Fig. and be inserted when in any'desired position with respect to the retaining means. If desired the lining may be rigid or still".

is, course, evident that instead of usi (r a plurality of resilient strips one of the might be rigid; the operation of inor removing a lining remaining subtant'ally tae same as that heretofore de- In is's. 6, 7 and 8 l have illustrated the strips 2 formed in one piece and arc-shaped strips 9 at their ends. ihese strips 9 are preferably fiat as shown in Fig. and the resilient supports 2 are preferably formed from the same by twisting the st ps near their ends as at 10 in order to give the supports the desired strength and lateral lexibility. In order to hold the strips 9 securely in position they are preferably clamped between the two d 5 oi the cap as shown in Fig.

is ev' en that upon the insertion and the lining the operation and removal or 1' ion the retaining means is the same mt heretolf'ore described in connection heretofore described, means may likewise, r either a punching of thin metal as shown in Fig. 7, or of a spring wir shown in 9.

l w a single piece cap res'l '1 lining supporting members 2, the ends of which extend tin-(nigh openings; in the sides of the cap and bent back upon the exterior of the can ll in order to hold them securely on. ll be understood tl1at the forms of n vention shown herein are several embodiments of my inventive idea and that I .1 are not attempted to describe all of the va ous modifications of the same which may be adopted without departing from its smut.

as "l What I claim as new and desire to secure by Letters Patent is as follows l. A casing cap provided with a lining retaining member having a yieldable portion normally disposed in a chord-like relation to the cap wall and movable toward the $211119.

2. In combination, a casing cap, an insulating lining adapted to snugly fit the interior thereof, and a transversely extending resilient member carried by said cap and laterally and outwardly yieldable to permit the insertion and removal of said lining.

3. In combination,'a casing cap, an insulating lining adapted to snugly fit the interior thereof, a transversely extending resilient member carried by said cap'and laterally and outwardly yieldable to permit the insertion of said lining and to snap therebeneath for supporting the same.

4. In combination, a cap, an insulating lining therein, and a retaining member having a portion engaging said cap and a portion spaced from said cap for supporting said insulating lining, said last-mentioned portion of said retaining member being yieldable toward the wall of said cap to permit the removal of said lining.

In combination, a casing cap, an insulating lining snugly inclosed therein, and a retaining member for said lining permanently secured to said cap and havin a resilient portion spaced from the interior wall thereof and underlying said linin 6. In combination, a casing cap, an insulating lining closely fitting the interior thereof, and a retaining strip fixed to said cap beneath the margin of said lining and having a resilient portion spaced from the wall of said cap and engaging the edge of said lining.

7. In combination, a casing cap, an insulating lining therein, and means carried by said cap and underlying said lining for supporting the latter, said means being yieldable away from said lining whereby the latter may be removed from said cap independently of the removal of said means.

8. In combination, a casing cap, an insulating lining closely fitting the interior thereof, and a retaining member for said lining carried within said cap, said member being yieldable away from said lining whereby the latter may be removed from said cap independently of the removal of said member.

9. A cap having a transversely extending lining ret ining member, said cap being formed in sections and said member being clamped between said sections.

10. The combination of a two part cap comprising a dome member and a shell engaging member formed, separately and secured thereto, and one or more lining relining retaining members extending trans taining members having the extremities versely thereof, one of said members being thereof clamped between said parts of said laterally yielding. carp. In witness whereof, I have hereunto sub- 5 11. A cap having a resilient lining rescribed my name in the presence of two wittaining strip extending transversely therenesses.

of, said cap being formed in sections and CHARLES J. KLEIN. said strip having its opposite ends clamped Witnesses: between said sections. FRANK H. HUBBARD,

10 12. A cap having therein a, plurality of H. L. Roenwnnn. 

